EASY

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Write the name of following compound.

${Na}_{2} {PbO}_{2}$

50% studentsanswered this correctly

Important Questions on Some Basic Concepts of Chemistry

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

25 ° C

consider the density of water is

1 g / L

and that of propanol to be

0.925 g / L

. What volume of propanol will have same number of molecules as present in

210 mL

of water?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

The correct order of the metallic character of the elements

Be, Al, Na, K

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

An organic compound contains

60 % C; 4.48 % H

and

35.5 % O .

Its empirical formula is

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

What is the SI unit of Pressure?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

At $600 K$ , the root mean square $(rms)$ speed of gas $X$ (molar mass $= 40$ ) is equal to the most probable speed of gas $Y$ at $90 K$ . The molar mass of the gas $Y$ is _____ $g {mol}^{- 1}$ . (Nearest integer)

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

Pressure is measured terms of:

1. Mass and Density

2. Work Done

3. Force and Area

4. Force and Distance

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

Which of the following represents the correct order of metallic character of the given elements?

EASY

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

What is the SI unit of Voltage?

MEDIUM

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

A particle

(m = 1 k g)

slides down a frictionless track

(A O C)

starting from rest at a point

A

(height

2 m

). After reaching

C,

the particle continues to move freely in air as a projectile. When it reaches its highest point

P

(height

1 m

), the kinetic energy of the particle (in

J

) is: (Figure drawn is schematic and not to scale; take

g = 10 m s^{- 2}

) ______________.
Question Image

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

A proton and an antiproton come close to each other in vacuum such that the distance between them is

10 cm .

Consider the potential energy to be zero at infinity. The velocity at this distance will be:

HARD

Chemistry>Physical Chemistry>Some Basic Concepts of Chemistry>Matter and its Nature

0.27 g

of a long chain fatty acid was dissolved in

100 {c m}^{3}

of hexane.

10 m L

of this solution was added dropwise to the surface of water in a round watch glass. Hexane evaporates and a monolayer is formed. The distance from edge to centre of the watch glass is